# SDR 2002UALA00479

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 15, 2002
- Submitted: April 2, 2002
- Operation: Air carrier
- Aircraft: [N668UA](https://openairdocs.org/aircraft/N668UA), registered now
- Make and model: Boeing 767322
- Aircraft serial: 30024
- Aircraft time: 10,029 hours, 3,334 cycles
- Engine: Pwa PW4052
- Engine time: 34,759 hours, 5,629 cycles
- System (JASC): [7532 · Compressor Bleed Valve](https://openairdocs.org/jasc/7532)
- Part: Actuator
- Part number: 8148902
- Part serial: 196
- Condition: Failed
- Location: Lt Engine
- Stage of operation: DE
- How discovered: O
- Nature of condition: R, E, J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2002UALA00479

## Discrepancy

AT FL260 AFTER THROTTLES RETARDED TO IDLE FOR DESCENT EXPERIENCED AUDIBLE COMPRESSOR STALL WITH PULSING VIBRATION.  LEFT ENGINE EEC C1 STATUS MESSAGE.  SURGE WAS DETERMINED TO BE <1.25 EPR AND CAUSED BY A FAILED 2.5 BLEED ACTUATOR.  ACCOMPLISHED FORWARD THRUST SURGE INSPECTIONS, REPLACED THE 2.5 BLEED ACTUATOR AND PERFORMED OPERATIONAL CHECKS CONFIRMING REPAIR.

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